Microsoft Teams, Outlook fail to launch on ARM-based Windows PCs

September 3, 2026 · BleepingComputer · Severity: LOW

Microsoft is working to fix a known issue that causes crashes and launch failures for Microsoft Teams and New Outlook users after installing updates released since the August 2026 Patch Tuesday.

Key Takeaways

Microsoft Teams and New Outlook crash on ARM-based Windows PCs after August 2026 Patch Tuesday updates.
The issue affects users who installed updates released since the August 2026 Patch Tuesday security update.
Microsoft is actively working on a fix for the launch failures and crashes on ARM-based Windows PCs.